Team building is all about getting the right people doing the right things in order to accomplish a shared vision.

This isn’t a new idea.
Jim Collins wrote about this in ‘Good to Great’, describing “disciplined people” and “disciplined action” as core components of breakthrough momentum.
In ‘Mastering the Rockefeller Habits’, Verne Harnish describes this as “the right people doing the right things right.”
Getting the right people doing the right things takes clear roles, clear priorities and regular follow-up. Start by being honest about whether each person is in the right seat, then make sure they know what good looks like. For more on this, have a read of how to attract and retain the right staff. The book Good to Great is a useful place to start if you have not read it.